Thurs changes to demand
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Transcript of Thurs changes to demand
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Bellringer
Graph and correctly label this demand
schedule
Price Movie ticketsPer night
$15 1000$12.50 2000$10 4000$7.50 7000
What economic concept is this graphic showing?
MANKIWCHAPTER 4 ALL WEEK
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Review of Law of Demand• What happens in the
following situations?• The price of college
tuition increases?• The price of blue ray
DVD players decreases?
• The price of Eegees drinks increases?
• Effect on other goods/services?
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2 important effects• Substitution Effect an increase in price of one good causes a
buyer to buy more of the other good, since the first good has become relatively expensive, and vice versa. The buyer substitutes consumption of the second good for consumption of the first.
• “substitutes” – a good which can be substituted for another• “complements” – a good that is purchased with another
• Income Effect – changes to a person’s income changes their quantity demanded
• Normal goods – goods you buy more of when your income increases
• Inferior goods – goods you buy less of when your income increases
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Why is this important for firms?
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What sorts of goods are these?
Others?Compliments?Normal/Inferior?
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Cultural?
• Preferences change
• Spam in Hawaii
• Sauerkraut at Pueblo
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Changes to demand
Does Demand change when the price of a good changes?
Only the Quantity demanded changes with price
Review:
What is the Q*D at Price = $1.50?
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Show +/- framework
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Quantity
$
Graphically speaking… Demand of movie tickets
D*
A RAISE!!!!
A Child!!!!
D after raise
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Determinants of Demand
• Changes to income
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Determinants of Demand• Availability and price of substitute goods
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Determinants of Demand• Availability and price of compliments
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Determinants of Demand• Changes to population
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Determinants of Demand• Expectations of the Future
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A trick to remember determinants of demand
• TRIBET = tastes of consumers
R = Related goods (P$ change)
I = Income of consumers
B = # of consumers
E = expectations of future
http://quizlet.com/2043838/individual-markets-flash-cards/
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Quantity
$
Graphically speaking… Demand of movie tickets
D*
A RAISE!!!!
A Child!!!!
D after raise
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A. The price of iPods falls
B. The price of music downloads falls
C. The price of CDs falls
A C T I V E L E A R N I N G A C T I V E L E A R N I N G 11
Demand CurveDemand Curve
28
Draw a demand curve for music downloads. What happens to it in each of the following scenarios? Why?
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A C T I V E L E A R N I N G A C T I V E L E A R N I N G 11
A. Price of iPods fallsA. Price of iPods falls
29
Q2
Price of music down-loads
Quantity of music downloads
D1D2
P1
Q1
Music downloads and iPods are complements.
A fall in price of iPods shifts the demand curve for music downloads to the right.
Music downloads and iPods are complements.
A fall in price of iPods shifts the demand curve for music downloads to the right.
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A C T I V E L E A R N I N G A C T I V E L E A R N I N G 11
B. Price of music downloads fallsB. Price of music downloads falls
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The D curve does not shift.
Move down along curve to a point with lower P, higher Q.
The D curve does not shift.
Move down along curve to a point with lower P, higher Q.
Price of music down-loads
Quantity of music downloads
D1
P1
Q1 Q2
P2
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A C T I V E L E A R N I N G A C T I V E L E A R N I N G 11
C. Price of CDs fallsC. Price of CDs falls
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P1
Q1
CDs and music downloads are substitutes.
A fall in price of CDs shifts demand for music downloads to the left.
CDs and music downloads are substitutes.
A fall in price of CDs shifts demand for music downloads to the left.
Price of music down-loads
Quantity of music downloads
D1D2
Q2
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TRIBE
Assignment due next Fri
For each part of the:
Formulate two scenarios and graph For example:Beef marketConsumers see news story about mad cow disease